PVC roofing is a type of single-ply membrane often used for flat or low-slope roofs, valued for its durability and resistance to chemicals. Granule loss typically refers to the wearing away or detachment of the mineral granules embedded in roofing materials like asphalt shingles, but in the context of PVC roofing, it can mean the surface becoming rough or damaged, revealing the membrane underneath. Granule loss usually happens due to prolonged exposure to UV rays, weathering, or mechanical damage. For PVC roofs, damage might appear as cracking, blistering, or chalky surface deterioration rather than literal granules coming off. Simple diagnostics include visually inspecting the roof for patches of wear, small cracks, or surface chalking, especially after severe weather events. Homeowners can gently clean small areas to check if the surface looks crumbly or if the protective coating is fading, but avoid walking extensively on the membrane as it can further damage the roof.
If you notice unusual surface texture or wear, it's a good idea to call a professional roofer experienced with PVC systems. They can perform a detailed inspection and moisture scan to check for underlying damage such as leaks or membrane punctures that may not be obvious. When speaking with a contractor, ask specific questions like, “What caused this visible damage, and how do you plan to repair it without affecting my roof warranty?” and “Do you recommend a full replacement, patching, or a protective coating to extend my roof’s life?” These questions ensure the roofer considers manufacturer guidelines and warranty requirements, which are important to avoid voiding your coverage. Keeping detailed records of inspections and repairs also helps maintain your roof’s warranty and value.